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Flights from Boston to San Francisco Starting at £76

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Boston to San Francisco

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Boston to San Francisco

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Sun Country Airlines
From £64
Spirit Airlines
From £82
Frontier Airlines
From £86
Southwest Airlines
From £106
United Airlines
From £118
American Airlines
From £171
Delta Air Lines
From £187
Alaska Airlines
From £187
Jetblue Airways
From £191
Southern Airways Express
From £491
ANA airlines

Find more flights and airlines

Alternative Routes from Boston to San Francisco

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Boston to San Francisco.

  • Cheapest
    Sun Country Airlines
    BOS
    11:30
    15h 28m
    2 transfer
    SFO
    23:58
    General Edward Lawrence Logan International Airport - San Francisco International Airport
    Tue, Apr 23Sun Country Airlines
    £64
  • Southern Airways Express
    BNH
    15:30
    23h 50m
    1 transfer
    SFO
    12:20
    Hartford Barnes Airport - San Francisco International Airport
    Tue, Apr 16Southern Airways Express
    £491
  • Southern Airways Express
    BNH
    15:30
    23h 50m
    1 transfer
    SFO
    12:20
    Hartford Barnes Airport - San Francisco International Airport
    Tue, Apr 16Southern Airways Express
    £491
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from Boston (BOS) to San Francisco (SFO) the cheapest?

    Airlines adjust prices for flights from Boston to San Francisco based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much are flights from Boston (BOS) to San Francisco (SFO) cost?

    According to Trip.com's data, the lowest price is around £335.
  • How long is the flight from Boston (BOS) to San Francisco (SFO)?

    It takes about 6 hours 37 minutes to fly from Boston (BOS) to San Francisco (SFO).
  • What is the transportation method from the main airport to downtown in San Francisco?

    • The distance from San Francisco International Airport to downtown is about 17km, by taxi about 30 minutes.
  • What are the most popular airlines that fly from Boston (BOS) to San Francisco (SFO)?

  • What's the most popular airline for direct flights from Boston (BOS) to San Francisco (SFO)?

    Delta Air Lines operates 13 direct flights from Boston (BOS) to San Francisco (SFO).
  • How many airports in San Francisco (SFO)?

    There are 1 airport(s) in San Francisco (SFO): San Francisco International Airport.

Flight Information from Boston to San Francisco

Cheapest direct flight price

£76

Cheapest return ticket price

£156

Cheapest month

November

Peak season for travel

September